THORACIC CAVITY. RESPIRATORY DIAPHRAGM. Diaphragm. A diaphragm is a muscular sheet with an inferior and a superior fascia: Superior fascia = parietal thoracic fascia. Inferior fascia = transversalis fascia. Separates thorax and abdomen. In moderate expiration:
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Superior fascia = parietal thoracic fascia.
Inferior fascia = transversalis fascia.
Reaches level of 5th rib on right side and 5th IC space on left.
Lower 6 ribs and cartilages.
Lumbar vertebrae and crura:
Right from L3.
Left from L2.
Right swings left and forms a weak sphincter around the esophagus.
Around aortic opening.
Bridges proximal ends of crura.
From deep fascia of psoas major muscle.
From transverse process to body of L1.
From deep fascia of quadratus lumborum muscle.
From transverse process of L1 to rib 12.
Inferior vena cava; right phrenic nerve
Esophagus; vagus nerves
Aorta; thoracic duct; azygos vein
Pericardiacophrenic artery from IT.
Musculophrenic artery from IT.
Superior phrenic artery from aorta.
Inferior phrenic artery from aorta.